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Wrap JSAutoRequest and replace usage of JSContext* with the wrapper.

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JSAutoRequest is required before calling into most JSAPI methods, for GC
reasons.
Calling it is required and fragile as one must not forget.
Further, SM52 and later make manipulating JSContext* dangerous as that
can cross Compartment(Realm in SM68) barriers (and ScriptInterface now
matches a Compartment).

The solution to both problems is to avoid using JSContext* in 0 A.D.
itself. To achieve this, a Request class is introduced, and must be used
to access a JSContext* from a scriptInterface. Further, Request is
passed to other ScriptInterface functions isntead of JSContext*, making
it obvious that the caller has already called it, reducing errors and
redundant JSAutoRequest calls.
Only JSNative functions now get a naked JSContext* without protection,
but the likelihood of forgetting a request is lower since many
ScriptInterface functions now expect it.

JSContext* is directly passed to JSAPI functions only.

Part of the SM52 migration, stage: SM45 compatible

Based on a patch by: Itms
Tested By: Freagarach
Refs #4893

Differential Revision: https://code.wildfiregames.com/D3088
This was SVN commit r24176.
This commit is contained in:
wraitii
2020-11-13 13:18:22 +00:00
parent 6a029d2a84
commit ee0d204bf6
74 changed files with 1591 additions and 1812 deletions
Download Patch File Download Diff File Expand all files Collapse all files
source/gui/CGUISetting.cpp
+8 -9
View File
@@ -41,23 +41,22 @@ bool CGUISetting<T>::FromString(const CStrW& Value, const bool SendMessage)
};
template<>
bool CGUISetting<CGUIColor>::FromJSVal(JSContext* cx, JS::HandleValue Value, const bool SendMessage)
bool CGUISetting<CGUIColor>::FromJSVal(const ScriptInterface::Request& rq, JS::HandleValue Value, const bool SendMessage)
{
CGUIColor settingValue;
if (Value.isString())
{
CStr name;
if (!ScriptInterface::FromJSVal(cx, Value, name))
if (!ScriptInterface::FromJSVal(rq, Value, name))
return false;
if (!settingValue.ParseString(m_pObject.GetGUI(), name))
{
JSAutoRequest rq(cx);
JS_ReportError(cx, "Invalid color '%s'", name.c_str());
JS_ReportError(rq.cx, "Invalid color '%s'", name.c_str());
return false;
}
}
else if (!ScriptInterface::FromJSVal<CColor>(cx, Value, settingValue))
else if (!ScriptInterface::FromJSVal<CColor>(rq, Value, settingValue))
return false;
m_pObject.SetSetting<CGUIColor>(m_Name, settingValue, SendMessage);
@@ -65,10 +64,10 @@ bool CGUISetting<CGUIColor>::FromJSVal(JSContext* cx, JS::HandleValue Value, con
};
template<typename T>
bool CGUISetting<T>::FromJSVal(JSContext* cx, JS::HandleValue Value, const bool SendMessage)
bool CGUISetting<T>::FromJSVal(const ScriptInterface::Request& rq, JS::HandleValue Value, const bool SendMessage)
{
T settingValue;
if (!ScriptInterface::FromJSVal<T>(cx, Value, settingValue))
if (!ScriptInterface::FromJSVal<T>(rq, Value, settingValue))
return false;
m_pObject.SetSetting<T>(m_Name, settingValue, SendMessage);
@@ -76,9 +75,9 @@ bool CGUISetting<T>::FromJSVal(JSContext* cx, JS::HandleValue Value, const bool
};
template<typename T>
void CGUISetting<T>::ToJSVal(JSContext* cx, JS::MutableHandleValue Value)
void CGUISetting<T>::ToJSVal(const ScriptInterface::Request& rq, JS::MutableHandleValue Value)
{
ScriptInterface::ToJSVal<T>(cx, Value, m_pSetting);
ScriptInterface::ToJSVal<T>(rq, Value, m_pSetting);
};
#define TYPE(T) \